GM Service Manual Online
For 1990-2009 cars only

Daytime Running Lamps (DRL) can make it easier for others to see the front of your vehicle during the day. Fully functional daytime running lamps are required on all vehicles first sold in Canada.

A light sensor on top of the instrument panel makes the DRL work, so be sure it is not covered. The DRL system will make front parking and turn signal lamps come on in daylight when the following conditions are met:

    • The ignition is on.
    • The exterior lamps control is off.
    • The parking brake is released.

When the DRL are on, only the front parking and turn signal lamps will be on. The instrument panel will not be lit up.

When it is dark enough outside, the exterior lamps automatically come on. When it is bright enough outside, the exterior lamps will turn off and the DRL will turn on. The headlamps can be turned on any time they are needed.

If the vehicle is started in a dark garage, the automatic headlamp system comes on immediately. Once the vehicle leaves the garage, it takes approximately one minute for the automatic headlamp system to change to DRL if it is light outside. During that delay, the instrument panel cluster may not be as bright as usual. Make sure the instrument panel brightness control is in the full bright position. See Instrument Panel Brightness.

To idle the vehicle with the DRL and automatic headlamps off, set the parking brake while the ignition is in LOCK/OFF. Then start the vehicle. The DRL and automatic headlamps will stay off until the parking brake is released.

The regular headlamp system should be turned on when needed.